How Databases Scale: Sharding, Replication & Read Replicas Explained

How do databases scale when millions of users are using an application at the same time?

In this video, we explain database scaling using a simple restaurant analogy. You’ll understand how a single database becomes a bottleneck, why replication helps, how read replicas reduce pressure, and how sharding distributes data across multiple systems.

Topics covered:
- Database scaling
- Sharding
- Replication
- Read replicas
- Primary database
- Distributed databases
- System design
- Backend architecture

If you’re preparing for backend engineering or system design interviews, this visual explanation will help you understand these concepts clearly.

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Видео How Databases Scale: Sharding, Replication & Read Replicas Explained канала TheTechAnatomy